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7Complex Systems of Charged Particles and their Interactions with Electromagnetic Radiation 2016
SUPERCONDUCTIVITY OF NUCLEI IN HE II
V.B. Bobrov, S.A. Trigger Joint Institute for High Temperatures, Russian Academy of Sciences
The low-frequency second-order singularity is found in the permittivity of a homogeneous and isotropic system of charged particles consisting of electrons and boson nuclei. This singularity is caused by the existence of a Bose-Einstein condensate for nuclei. The result obtained leads to the existence of the "nuclei superconductivity", which can be experimentally verified in superfluid He II. The results of the proposed experiment can be considered as a direct proof of the existence of a Bose-Einstein condensate in superfluid He II.
The transition to the state of the "superconductivity of nuclei" is possible in principle for conductors, as well as for semiconductors and dielectrics. In this connection, we note that the insulator-superconductor transition is well known when considering the electronic superconductivity.
These statements are direct consequences of our derivation and in fact based only on the definition of the BEC concept via ODLRO (off-diagonal long-range order) for the one-particle density matrix without use of the perturbation theory on the interparticle interaction in the CS (in contrast to the electronic superconductivity theory).
The BEC currently obtained in rarefied gases is strongly inhomogeneous and seems inappropriate for the "superconductivity of nuclei" straightforward observation. The superfluid He II is an appropriate object for experimental confirmation of the above results. It should also be emphasized that an experimental validation of the existence of the "superconductivity of nuclei" is of fundamental importance for solving the problem of the relation between the superfluidity phenomenon and the existence of BEC.
